A rare cause of drug-resistant epilepsy and nonconvulsive status epilepticus: Ring chromosome 20

Ring chromosome 20 presents as a drug-resistant epilepsy syndrome with complex partial seizures and nonconvulsive status epilepticus. Other characteristics are mild to moderate learning disability, and various dysmorphic features. Its diagnosis necessitates a high index of suspicion since the incidence is rare and there is no a specific phenotypic expression. Case: Here we present a child admitted to our pediatric neurology clinic with complex partial seizures and nonconvulsive status epilepticus. Cytogenic studies revealed ring chromosome 20. Conclusion: Cytogenic studies should be part of the evaluation in epilepsy patients who presented with drug resistant epilepsy of unknown etiology.